Attachment for pressure retaining valves



May 1, 1934. s. 1.. JOINER ATTACHMENT FOR PRESSURE RETAINING VALVES Filed Sept. 28, 1931 Patented May 1, 1934 UNFTED STATES TENT OFFEE ATTACHMENT FOR PRESSURE RETAINING VALVES 4 Claims.

This invention relates to an attachment for pressure retaining valves, and more particularly for an attachment to pressure retaining valves for air brakes on railroad freight and passenger cars.

One object of the invention is to provide an attachment with the exhaust port of an air brake pressure retaining valve which will allow the air, moisture and other foreign matter to be exhausted from the port through the attachment, but will prevent insects and the like from depositing solid or other foreign matter in the exhaust port.

Another object of the invention is to provide a simple, inexpensive and durable attachment which can be very inexpensively manufactured and which will effectually serve the purpose set forth in the foregoing object.

With these and other objects in view, the

invention will be more readily understood by referring to the attached drawing, in which,

Figure 1 is a side elevation of a standard air brake pressure retaining valve showing my invention attached to the exhaust port of the valve.

Fig. 2 is a fragmentary side elevation of the exhaust port portion of the pressure retaining valve showing my attachment partly in section.

Fig. 3 is a sectional View on the lines 3-3 of Fig. 2.

Fig. 4 is a view showing an elevation of the exhaust port portion of the pressure retaining valve partly in section and showing my attachment in section embodying a slight modification of the invention.

Fig. 5 is a transverse sectional view taken on the lines 55 of Fig. 4 looking in the direction of the arrows.

Referring more specifically to the drawing, a indicates the usual air brake pressure retaining valve and b denotes the inlet for the air pressure to the valve and at 0 there is shown the exhaust port of the air brake pressure retaining valve. My invention generally indicated by the numeral 1 is shown attached to the exhaust port 0 of the air brake pressure retaining valve.

The numeral 1 denotes in general my invention which consists of a hollow nipple threaded at its upper end as at 2, and being provided adjacent the upper end with a wrench receiving portion 3 which also forms a shoulder 4. The nipple consists of an angular portion 5 having therein a slot 6 and a substantially vertical portion '7 having at its end a reticulated wire screen closure 8 which may be attached thereto by welding, soldering or in any particular manner, as

at 9. The narrow slot 6 preferably extends sub stantially one-third of the circumference of the hollow nipple 1, such as shown in Fig. 3.

In the modification of my invention, as shown in Fig. 4, the hollow nipple 1 is provided with the wrench receiving portion 3, the shoulder 4, and the screw threads 2, as in the invention disclosed in Fig. l. The nipple is shown as consisting of the angular portion 5 and the substantially vertical portion '7. At the end of the nipple there are provided screw threads 10 which are adapted to receive a nut 11 having a central opening 12. A reticulated wire screen 13 is adapted to seat in the nut, as at 14, and against the outer end 15 of the nipple. Adjacent the outer end of the nipple 15 there is provided a series of relatively small oppositely disposed openings 16.

The slot 6 is very narrow, and the openings 16 are small to prevent insects entering and depositing solid matter in the exhaust port.

It will be seen that the modification of the invention as disclosed in Fig. 4, permits of removing and replacing the reticulated screen closure 13 in the event that the same becomes clogged, rusted or worn out.

In both forms of my invention, the primary purpose is to prevent insects, such as sand daubers, bees and the like, from depositing solid or other foreign matter in the exhaust port 0 of the air pressure retaining valve. Heretofore, these exhaust ports of the air pressure retaining valves were left open and. when railroad freight and passenger cars, which were equipped with these pressure retaining valves, were left on the siding for any length of time, it was found that various insects, such as mentioned above, made their nests in the exhaust openings of the air pressure retaining valves, and particularly the sand daubers would deposit dirt in this exhaust opening, thereby preventing the air from exhausting through the opening, and in many cases, causing serious accidents and preventing proper actuation of the braking system. It will be understood that it is absolutely necessary that the exhaust port 0 of the air pressure retaining valve be free and open at all times so that the exhaust air may be exhausted therefrom. It is to be further understood that every time the brakes are to be released, air exhausts through the exhaust port 0. The air pressure retaining valve is usually positioned on the brake end of the car near the brake shaft. This valve is connected at b by a pipe line with a triple valve of the braking system and the triple valve exhausts air to the retainer valve, which in turn exhausts the air through the opening 0.

From the foregoing, it is believed that it will be clear that the exhaust opening should at all times be open and prevented from being clogged up by insects and the like, but yet permitting discharge of the exhaust air therefrom. My invention has overcome this serious objection to the air pressure retaining valve, and it will be understood that by my attachment, the exhaust air from the retaining valve will be permitted to exhaust through the reticulated screen closures 8 and 13 and also through the slot 6 as well as the openings 16. In the event there is any moisture or other foreign matter in the triple valve, the slot and openings, and the reticulated closure screens will permit discharge of such matter. It might be said here that there is a discharge of air approximately seventy pounds through the exhaust port 0 of the air pressure retaining valve.

From the foregoing it is believed it will be readily understood that I have perfected an attachment with the exhaust port of a standard air pressure retaining valve which will permit discharge of the exhaust air and other foreign matter and yet prevent absolutely the depositing of foreign matter in the exhaust opening by insects and the like.

It will be understood that various changes in the form, proportion, and minor details of construction, within the scope of the claims, may be resorted to Without departing from the spirit of the invention or sacrificing any of the advantages thereof.

What is claimed is:

1. The combination with an air brake pressure retaining valve having an exhaust port, of a hollow nipple attached at one end to said port and extending outwardly therefrom and being provided at its other end with a reticulated closure, intermediate the ends of the nipple there is provided an opening, whereby exhaust air, moisture and other foreign matter are allowed to escape through the said reticulated closure and said opening, but preventing depositing of solid matter in said port by insects and the like.

2. An attachment for air brake pressure retaining valves comprising a hollow nipple, one end of which is adapted to be attached to the exhaust port of said valve, an opening in said nipple intermediate its ends, and a removable reticulated closure at the other end of said nipple, whereby exhaust air, moisture and other foreign matter are allowed to escape through said reticulated closure and said opening, but preventing depositing of solid matter in said port by insects and the like.

3. An attachment for air brake pressure retaining valves comprising a hollow nipple having an angular portion and a substantially vertical portion, said angular portion being adapted to be attached to the exhaust port of said valve, and said vertical portion at its. outer end. being provided with a reticulatedv closure, and .a slot in said angleportion adjacent said vertical portion whereby exhaust air, moisture and other foreign matter are allowed to escape through said reticulated closure and said slot, but preventing depositing of solid matter in said port by, insects and the like.

4. An attachment for air brake pressure re-. taining valves comprising a hollow nipple having an angular portion and a verticalportion, said angular portion being adapted to be attached to the exhaust port of said valve, and saidvertical portion. at its outer end being provided with a removable reticulated closure, and said. vertical portion of the nipple adjacent said closure being also provided with openings, whereby exhaust air, moisture and other foreign, matter are. allowed to escape through said reticulated closure and said openings, but preventing depositing of solid matter in said port by insectsand the like.

SYLVESTER. L. JOINER. 

